hollister



(No Model.)

W. H. HOLLISTER.

GAR WHEEL CHILL.

` Patented June 18, 1889.

lun- Annu y Zon .KW/429m:

UNITED `STATES PATENT OFFICE.

XVILLIAM II. IIOLLIS'IER, OF RAIWIAPO, NET YORK, ASSIGNOR OF ONE-HALF TO WILLIAM IV. SNOIV, OF SAME PLACE.

CAR-WH EEL CHILL.

SPECF-ICATION forming part of Letters Patent No. 405,355, dated June 18, 1889.

Application tiled October 3l, 1888. Serial No. 289.674. (No model.)

To @ZZ whom it may con/cern.- cally forming part of the chill add greatly to Be it known that I, WILLIAM Il. l-IOLLIsTER, the strength of the latter, and, owing to the a citizen of the United States, residing at Ramgreater strength' of the wrought metal than apo, in the county of Rockland land State of cast metal, such pipes may, as shown, be 55 5 New York, have invented certain new and placed very close to the chilling-surface of the useful Improvements in Car-Vheel Ohills, of chill, so as to maintain a low temperature at which the following is a full, clear, and exact such surface and prevent that variation in specification. temperature and the cracking or breaking of It has been common in using waterito cqualthe chill which result when the inner wall is 6o ro ize the temperature of chills to make castthick and becomes heated and expands while metal chills with passages for the iow of water the outer Wall is keptcomparatively cool. with the purpose of maintaining the chills at As shown in Fig. l, the pipe 2 is in two a comparativelylow tempera-ture and precurved sections, one end of each section bey venting that expansion of the chill from the ing united to a T-coupling 5, from which eX- 65 r 5 heat that would result in casting wheels of tends an inlet branch 2, while the other ends unequal sizes in the same chill, and generally are united by a T-coupling 7 ,from which eX- the water-passages have been formed by the tends a discharge-pipe 4. use of cores in casting the chills, so that the Any suitable number of pipes may be incompleted chill is of cast metal, with circulatserted in the body of the chill when a large 7o zo ing-channels in the body thereof. Such chills surface is to be kept cool. Thus in Fig. 3 the are ineffectual from their liability t0 be readchill is shown as having three pipes 2 in a row, ily fractured, from the porous character of the all united with and by a coupling 9, having cast metal, and because of the necessity for a single inlet branch 3. the purpose of securing sufficient strength of In Fig. 4L there are two sets of pipes. The two 7 5 2 5 leaving the inner or chill walls of such thickpipes constituting the upper set are united at ness as to reduce the cooling effect of the cirone end with the inlet 3, and connect through culating liquid thereon. To obviate these obcouplings 10 12 with the opposite ends of the jections, I construct the chill as I shall herelower two pipes. The other ends of the lower I inaft er describe, and as illustrated in the pipes connect with the outlet 4. at the same 8o 3o accompanying drawings, in whichside as the inlet.

Figure 1 is a sectional plan of a car-wheel I prefer to embed the wrought-metal pipes chill embodying my invention. Fig. 2 is a in the cast-metal body of the chill, as decross-section enlarged. Fig. 3 is a sectional scribed; but, when the form of the chill will view illustrating a modification. Fig. 4 is a allow it, the body may be made in channeled 8 5 3 5 section of a car-wheel chill, illustrating a difsections bolted together, as shown in Fig. 5,

ferent arrangement of circulating-pipes. Fig. or the body may be bored out to receive the, 5 is a section illustrating a modification. circulating-pipes, which are then inserted.

The chill A is externally of the usual form, I am aware that wrought-metal steam-pipes adapted to the article to be cast; but, owing have been inserted in chills near the outer 9o .to to the increased strength secured by my imsurface to heat the external portion of the provement, it need not be so thick and heavy chills; but this differs essentiallyfrom my inas those of usual construction. vention, inasmuch as there is not in :such chills Instead of coring the chill to make the cirthat differencein expansion that results when culating-passages Qc, I cast the chill around water-chills have heretofore been used, and 95 45 and upon wrought-metal pipes 2, arranged to because there is not that necessity of preconform to the outline of the chill and as near venting leakage, inasmuch as the steam will as possible to the inner or chilling surface not pass through the minute orifices through f. thereof, and I provide such pipe or pipes with which water will escape. an inlet-pipe 3 and outlet-pipe 4, suitably ar- Tithout limiting myself to the precise conroo o ranged to receive and discharge the coolingstruction and arrangement of parts shown, I

uid. The pipes thus inserted in and practiclaim- A chill consisting of a body of cast metal with circulating-passages formed by Wroughtmetal pipes embedded in the cast-metal body in immediate proximity to the Chilling-face,

5 and provided with inlet and outlet branches,

substantially as set forth.

In testimony whereof I have signed my n ame to this specification in the presence of two sub- Witnesses:

GARRETT BURGERT, CHARLES B. CHURCH. 

